“690 Trillion Suns” -New Look at an Ancient Quasar So Bright It Obscured a Massive Galaxy Cluster

  

Phoenix Cluster

 

“We started asking ourselves why we had not found it earlier, because it’s very extreme in its properties and very bright,” says Michael McDonald, assistant professor of physics in MIT’s Kavli Institute for Astrophysics and Space Research about the discovery of a sprawling new galaxy cluster hiding in plain sight. “It’s because we had preconceived notions of what a cluster should look like. And this didn’t conform to that, so we missed it.”

(more…)